反应详情

In a round-bottomed flask were placed N-BocSerine (20.0 g, 89.605 mmol, 1 eq.), benzyl bromide (10.76 ml, 90.50 mmol, 1.01 eq.) and cesium carbonate (56.64 g, 173.84 mmol, 1.94 eq.) in DMF (180 mL). The suspension was stirred under nitrogen at room temperature for 2 hrs to overnight. The mixture was partitioned between water and ethyl acetate (1:1, 1000 ml) and aqueous layer was re-extracted with ethyl acetate(2×200 mL). The combined organic layers were washed with water (2×500 mL), saturated sodium chloride, and dried over sodium sulfate. The solvents were removed in vacuo and the crude material purified on silica gel to get N-Boc-serine benzyl ester.

1. customIn a round-bottomed flask were placed
2. customThe mixture was partitioned between water and ethyl acetate (1:1, 1000 ml) and aqueous layer
3. extractionwas re-extracted with ethyl acetate(2×200 mL)
4. washThe combined organic layers were washed with water (2×500 mL), saturated sodium chloride
5. dry with materialdried over sodium sulfate
6. customThe solvents were removed in vacuo
7. customthe crude material purified on silica gel